What is NATO?
What is NATO?
What does NATO stand for?
NATO is an acronym for North Atlantic Treaty Organization.
How many countries are in NATO?
Currently 30 countries are members of NATO.
Which countries are in NATO?
The current member states of NATO are Albania, Belgium, Bulgaria, Canada, Croatia, the Czech Republic, Denmark, Estonia, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, Montenegro, the Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Turkey, the United Kingdom, and the United States.
What are the newest members of NATO?
North Macedonia is the newest member of NATO; it joined the alliance in 2020. In May 2022 Sweden and Finland announced their intention to join NATO in response to Russia’s unprovoked invasion of Ukraine.
Read a brief summary of this topic
NATO, in full North Atlantic Treaty Organization, International military alliance created to defend western Europe against a possible Soviet invasion after World War II.
A 1948 collective-defense alliance between Britain, France, the Netherlands, Belgium, and Luxembourg was recognized as inadequate to deter Soviet aggression, and in 1949 the U.S. and Canada agreed to join their European allies in an enlarged alliance. A centralized administrative structure was set up, and three major commands were established, focused on Europe, the Atlantic, and the English Channel (disbanded in 1994). The admission of West Germany to NATO in 1955 led to the Soviet Union’s creation of the opposing Warsaw Treaty Organization, or Warsaw Pact.
Because NATO ground forces were smaller than those of the Warsaw Pact, the balance of power was maintained by superior weaponry, including intermediate-range nuclear weapons. After the Warsaw Pact’s dissolution and the end of the Cold War in 1991, NATO withdrew its nuclear weapons and attempted to transform its mission. It involved itself in the Balkan conflicts of the 1990s. Article 5 of the North Atlantic Treaty stated that an attack on one signatory would be regarded as an attack on the rest, and this article was first invoked in 2001 in response to the terrorist September 11 attacks against the U.S.
Additional countries joined NATO in 1999, 2004, 2009, 2017, and 2020 to bring the number of full members to 30. France withdrew from military participation in 1966 but rejoined NATO’s integrated military command in 2009.
North Atlantic Treaty Organization (NATO), military alliance established by the North Atlantic Treaty (also called the Washington Treaty) of April 4, 1949, which sought to create a counterweight to Soviet armies stationed in central and eastern Europe after World War II. Its original members were Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom, and the United States. Joining the original signatories were Greece and Turkey (1952); West Germany (1955; from 1990 as Germany); Spain (1982); the Czech Republic, Hungary, and Poland (1999); Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia, and Slovenia (2004); Albania and Croatia (2009); Montenegro (2017); and North Macedonia (2020). France withdrew from the integrated military command of NATO in 1966 but remained a member of the organization; it resumed its position in NATO’s military command in 2009. Finland and Sweden, two long-neutral countries, were formally invited to join NATO in 2022.
The heart of NATO is expressed in Article 5 of the North Atlantic Treaty, in which the signatory members agree that
an armed attack against one or more of them in Europe or North America shall be considered an attack against them all; and consequently they agree that, if such an armed attack occurs, each of them, in exercise of the right of individual or collective self-defense recognized by Article 51 of the Charter of the United Nations, will assist the Party or Parties so attacked by taking forthwith, individually and in concert with the other Parties, such action as it deems necessary, including the use of armed force, to restore and maintain the security of the North Atlantic area.
NATO invoked Article 5 for the first time in 2001, after the September 11 attacks organized by exiled Saudi Arabian millionaire Osama bin Laden destroyed the World Trade Center in New York City and part of the Pentagon outside Washington, D.C., killing some 3,000 people.
Historical background
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After World War II in 1945, western Europe was economically exhausted and militarily weak (the western Allies had rapidly and drastically reduced their armies at the end of the war), and newly powerful communist parties had arisen in France and Italy. By contrast, the Soviet Union had emerged from the war with its armies dominating all the states of central and eastern Europe, and by 1948 communists under Moscow’s sponsorship had consolidated their control of the governments of those countries and suppressed all noncommunist political activity. What became known as the Iron Curtain, a term popularized by Winston Churchill, had descended over central and eastern Europe. Further, wartime cooperation between the western Allies and the Soviets had completely broken down. Each side was organizing its own sector of occupied Germany, so that two German states would emerge, a democratic one in the west and a communist one in the east.
In 1948 the United States launched the Marshall Plan, which infused massive amounts of economic aid to the countries of western and southern Europe on the condition that they cooperate with each other and engage in joint planning to hasten their mutual recovery. As for military recovery, under the Brussels Treaty of 1948, the United Kingdom, France, and the Low Countries—Belgium, the Netherlands, and Luxembourg—concluded a collective-defense agreement called the Western European Union. It was soon recognized, however, that a more formidable alliance would be required to provide an adequate military counterweight to the Soviets.
By this time Britain, Canada, and the United States had already engaged in secret exploratory talks on security arrangements that would serve as an alternative to the United Nations (UN), which was becoming paralyzed by the rapidly emerging Cold War. In March 1948, following a virtual communist coup d’état in Czechoslovakia in February, the three governments began discussions on a multilateral collective-defense scheme that would enhance Western security and promote democratic values. These discussions were eventually joined by France, the Low Countries, and Norway and in April 1949 resulted in the North Atlantic Treaty.
Organization
Spurred by the North Korean invasion of South Korea in June 1950 (see Korean War), the United States took steps to demonstrate that it would resist any Soviet military expansion or pressures in Europe. Gen. Dwight D. Eisenhower, the leader of the Allied forces in western Europe in World War II, was named Supreme Allied Commander Europe (SACEUR) by the North Atlantic Council (NATO’s governing body) in December 1950. He was followed as SACEUR by a succession of American general
The North Atlantic Council, which was established soon after the treaty came into effect, is composed of ministerial representatives of the member states, who meet at least twice a year. At other times the council, chaired by the NATO secretary-general, remains in permanent session at the ambassadorial level. Just as the position of SACEUR has always been held by an American, the secretary-generalship has always been held by a European.
NATO’s military organization encompasses a complete system of commands for possible wartime use. The Military Committee, consisting of representatives of the military chiefs of staff of the member states, subsumes two strategic commands: Allied Command Operations (ACO) and Allied Command Transformation (ACT). ACO is headed by the SACEUR and located at Supreme Headquarters Allied Powers Europe (SHAPE) in Casteau, Belgium. ACT is headquartered in Norfolk, Virginia, U.S. During the alliance’s first 20 years, more than $3 billion worth of “infrastructure” for NATO forces—bases, airfields, pipelines, communications networks, depots—was jointly planned, financed, and built, with about one-third of the funding from the United States. NATO funding generally is not used for the procurement of military equipment, which is provided by the member states—though the NATO Airborne Early Warning Force, a fleet of radar-bearing aircraft designed to protect against a surprise low-flying attack, was funded jointly.
The role of Germany
A serious issue confronting NATO in the early and mid-1950s was the negotiation of West Germany’s participation in the alliance. The prospect of a rearmed Germany was understandably greeted with widespread unease and hesitancy in western Europe, but the country’s strength had long been recognized as necessary to protect western Europe from a possible Soviet invasion. Accordingly, arrangements for West Germany’s “safe” participation in the alliance were worked out as part of the Paris Agreements of October 1954, which ended the occupation of West German territory by the western Allies and provided for both the limitation of West German armaments and the country’s accession to the Brussels Treaty. In May 1955 West Germany joined NATO, which prompted the Soviet Union to form the Warsaw Pact alliance in central and eastern Europe the same year. The West Germans subsequently contributed many divisions and substantial air forces to the NATO alliance. By the time the Cold War ended, some 900,000 troops—nearly half of them from six countries (United States, United Kingdom, France, Belgium, Canada, and the Netherlands)—were stationed in West Germany.
The role of France
France’s relationship with NATO became strained after 1958, as Pres. Charles de Gaulle increasingly criticized the organization’s domination by the United States and the intrusion upon French sovereignty by NATO’s many international staffs and activities. He argued that such “integration” subjected France to “automatic” war at the decision of foreigners. In July 1966 France formally withdrew from the military command structure of NATO and required NATO forces and headquarters to leave French soil; nevertheless, de Gaulle proclaimed continued French adherence to the North Atlantic Treaty in case of “unprovoked aggression.” After NATO moved its headquarters from Paris to Brussels, France maintained a liaison relationship with NATO’s integrated military staffs, continued to sit in the council, and continued to maintain and deploy ground forces in West Germany, though it did so under new bilateral agreements with the West Germans rather than under NATO jurisdiction. In 2009 France rejoined the military command structure of NATO.
NATO during the Cold War
From its founding, NATO’s primary purpose was to unify and strengthen the Western Allies’ military response to a possible invasion of western Europe by the Soviet Union and its Warsaw Pact allies. In the early 1950s NATO relied partly on the threat of massive nuclear retaliation from the United States to counter the Warsaw Pact’s much larger ground forces. Beginning in 1957, this policy was supplemented by the deployment of American nuclear weapons in western European bases. NATO later adopted a “flexible response” strategy, which the United States interpreted to mean that a war in Europe did not have to escalate to an all-out nuclear exchange. Under this strategy, many Allied forces were equipped with American battlefield and theatre nuclear weapons under a dual-control (or “dual-key”) system, which allowed both the country hosting the weapons and the United States to veto their use. Britain retained control of its strategic nuclear arsenal but brought it within NATO’s planning structures; France’s nuclear forces remained completely autonomous.
A conventional and nuclear stalemate between the two sides continued through the construction of the Berlin Wall in the early 1960s, détente in the 1970s, and the resurgence of Cold War tensions in the 1980s after the Soviet Union’s invasion of Afghanistan in 1979 and the election of U.S. Pres. Ronald Reagan in 1980. After 1985, however, far-reaching economic and political reforms introduced by Soviet leader Mikhail Gorbachev fundamentally altered the status quo. In July 1989 Gorbachev announced that Moscow would no longer prop up communist governments in central and eastern Europe and thereby signaled his tacit acceptance of their replacement by freely elected (and noncommunist) administrations. Moscow’s abandonment of control over central and eastern Europe meant the dissipation of much of the military threat that the Warsaw Pact had formerly posed to western Europe, a fact that led some to question the need to retain NATO as a military organization—especially after the Warsaw Pact’s dissolution in 1991. The reunification of Germany in October 1990 and its retention of NATO membership created both a need and an opportunity for NATO to be transformed into a more “political” alliance devoted to maintaining international stability in Europe.
NATO in the post-Cold War era
After the Cold War, NATO was reconceived as a “cooperative-security” organization whose mandate was to include two main objectives: to foster dialogue and cooperation with former adversaries in the Warsaw Pact and to “manage” conflicts in areas on the European periphery, such as the Balkans. In keeping with the first objective, NATO established the North Atlantic Cooperation Council (1991; later replaced by the Euro-Atlantic Partnership Council) to provide a forum for the exchange of views on political and security issues, as well as the Partnership for Peace (PfP) program (1994) to enhance European security and stability through joint military training exercises with NATO and non-NATO states, including the former Soviet republics and allies. Special cooperative links were also set up with two PfP countries: Russia and Ukraine.
The second objective entailed NATO’s first use of military force, when it entered the war in Bosnia and Herzegovina in 1995 by staging air strikes against Bosnian Serb positions around the capital city of Sarajevo. The subsequent Dayton Accords, which were initialed by representatives of Bosnia and Herzegovina, the Republic of Croatia, and the Federal Republic of Yugoslavia, committed each state to respecting the others’ sovereignty and to settling disputes peacefully; it also laid the groundwork for stationing NATO peacekeeping troops in the region. A 60,000-strong Implementation Force (IFOR) was initially deployed, though a smaller contingent remained in Bosnia under a different name, the Stabilization Force (SFOR). In March 1999 NATO launched massive air strikes against Serbia in an attempt to force the Yugoslav government of Slobodan Milošević to accede to diplomatic provisions designed to protect the predominantly Muslim Albanian population in the province of Kosovo. Under the terms of a negotiated settlement to the fighting, NATO deployed a peacekeeping force called the Kosovo Force (KFOR).
The crisis over Kosovo and the ensuing war gave renewed impetus to efforts by the European Union (EU) to construct a new crisis-intervention force, which would make the EU less dependent on NATO and U.S. military resources for conflict management. These efforts prompted significant debates about whether enhancing the EU’s defensive capabilities would strengthen or weaken NATO. Simultaneously there was much discussion of the future of NATO in the post-Cold War era. Some observers argued that the alliance should be dissolved, noting that it was created to confront an enemy that no longer existed; others called for a broad expansion of NATO membership to include Russia. Most suggested alternative roles, including peacekeeping. By the start of the second decade of the 21st century, it appeared likely that the EU would not develop capabilities competitive with those of NATO or even seek to do so; as a result, earlier worries associated with the spectre of rivalry between the two Brussels-based organizations dissipated.
During the presidency of Bill Clinton (1993–2001), the United States led an initiative to enlarge NATO membership gradually to include some of the former Soviet allies. In the concurrent debate over enlargement, supporters of the initiative argued that NATO membership was the best way to begin the long process of integrating these states into regional political and economic institutions such as the EU. Some also feared future Russian aggression and suggested that NATO membership would guarantee freedom and security for the newly democratic regimes. Opponents pointed to the enormous cost of modernizing the military forces of new members; they also argued that enlargement, which Russia would regard as a provocation, would hinder democracy in that country and enhance the influence of hard-liners. Despite these disagreements, the Czech Republic, Hungary, and Poland joined NATO in 1999; Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia, and Slovenia were admitted in 2004; and Albania and Croatia acceded to the alliance in 2009.
Meanwhile, by the beginning of the 21st century, Russia and NATO had formed a strategic relationship. No longer considered NATO’s chief enemy, Russia cemented a new cooperative bond with NATO in 2001 to address such common concerns as international terrorism, nuclear nonproliferation, and arms control. This bond subsequently frayed, however, due to regional aggression by Russian Pres. Vladimir Putin. After Russia invaded Georgia in 2008, NATO strengthened ties with the latter country and established the NATO-Georgia Commission “to help Georgia achieve its goal of membership in NATO.” In 2014 pro-Russian Ukrainian Pres. Viktor Yanukovych fled Ukraine after months of popular protests, and Russia responded by invading the Ukrainian autonomous republic of Crimea. Russia illegally annexed Crimea and fomented uprisings in Ukraine’s Donbas region in an effort to reassert control over its neighbour. Ukraine checked the Russian-backed campaign in the Donbas, and NATO reaffirmed its support for Ukraine’s democratically elected government and its internationally recognized borders.Trump questioned the relevance of NATO and discussed withdrawing the United States from the alliance; even the suggestion of such an action was seen as a boon to Putin. Trump’s national security team moved to reassure allies that the U.S. remained committed to NATO, however, and, by the end of Trump’s term in 2021, the U.S. troop presence in Europe was almost entirely unchanged. By the end of that year, Russia had begun a massive military buildup along the Ukrainian frontier under the guise of joint maneuvers with the Belarusian army. In February 2022 there were as many as 190,000 Russian troops along the Russo-Ukrainian border, in Belarus, in Russian-occupied Crimea, and in the Russian-backed separatist enclave of Transdniestria in Moldova. On February 24 Putin announced the beginning of a “special military operation” and launched a full-scale invasion of Ukraine. Although the Russians made some early gains, their advances soon stalled against a spirited Ukrainian defense.
Ukrainian Pres. Volodymyr Zelensky appealed to Western countries for military aid, and individual NATO members began a massive transfer of hardware to bolster the Ukrainian arsenal. The administration of U.S. Pres. Joe Biden took a leading role in marshaling the response to the greatest threat to European security since World War II. The speed and unity of NATO’s reaction to Russian aggression in Ukraine dramatically dispelled any doubts about the continued relevance of the alliance. Sweden and Finland, two countries with a long history of neutrality, announced their intention to join NATO in the wake of the Russian invasion, and the U.S. deployed additional military assets to Poland and the Baltic states. In June 2022, at the first annual NATO summit since the invasion, NATO Secretary-General Jens Stoltenberg announced “the biggest overhaul of our collective deterrence and defense since the Cold War.” In addition to formally inviting Sweden and Finland to join the alliance, Stoltenberg declared that NATO’s rapid reaction force, a collection of air, sea, and land units maintained at a state of high readiness, would increase from 40,000 troops to more than 300,000.
David G. HaglundThe Editors of Encyclopaedia Britannica
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